“Big Brother is Coming!”
One day, a little while after the Hero Club gained Nogi Sonoko as its sixth member—
Karin: 299... 300
Karin: Okay, that finishes my daily routine
Karin: An email?
Karin: ...From the Taisha, huh? Let's see...
Karin: ...W-what!?

Sonoko: I finished the new owner wanted poster for the cats~
Fu: Wow, Nogi, your artwork's pretty good.
Sonoko: Eheheh, I know, right~
Itsuki: Sonoko-san's artwork's good? Let me see too—
Itsuki: Wait, what?
Itsuki: (I can't tell what's drawn here...! Is this avant-garde art!?)
Fu: You brought what's behind the cat to the front. That's such novel presentation.
Sonoko: Ehheh~
Itsuki: (Onee-chan can understand it...? Oh, I see, it's because they're the same...)
Itsuki: Yuna-san, Togo-sempai...
Itsuki: I think this club... needs more artistic taste...
Yuna: Ahahah...
Togo: True... we do have Karin-chan, after all...
Fu: Now that you mention it, where is that other artist of ours? Skipping?
Karin: ...
Fu: Speak of the devil... Wait, something happen? You look serious.
Karin: ...
Sonoko: Nibosshi, whaddaya think of the cat I drew~?
Karin: Hm? That's really quite artistically done. Way to go.
Togo: (Ahh...)
Itsuki: (I knew it...)
Karin: Forget the drawing... More importantly...
Karin: There's something I'd like to ask you, Sonoko...
Sonoko: Me? Not everyone else?
Karin: Yeah...
Yuna: Hero club five tenets! If you're troubled, talk to someone!
Yuna: Let us in on it too! Right, Fu-sempai?
Fu: I mean if it's something you're okay telling us.
Itsuki: I'm always ready to tell your fortune, Karin-san.
Togo: I can at least lend you some wisdom.
Karin: You guys...
Karin: Okay, I'll ask you all. So actually...
Fu: --Hold it right there!
Karin: ...Fu?
Fu: If we're gonna talk... then let's move to a more appropriate place.

Fu: *slurp~* *gulp* *gulp*...
Fu: Whew~... thanks for the food!
Karin: --wait, this is just the usual udon place!
Karin: How is this a more 'appropriate' place? You were just hungry, weren't you!?
Sonoko: Udon's delicious~ I recommend the shrimp kakiage as a topping~
Yuna: Shiba shrimp sure is delicious!
Togo: You cannot fight wars on an empty stomach... right?
Itsuki: Exactly!
Karin: I think you guys just killed all the tension.
Fu: Well, our stomachs are full now, so go ahead.
Karin: Finally, let's get to the point...
Sonoko: I've gotten kinda sleepy~
Togo: Sonocchi, if you sleep right after you eat, you'll become a sumo wrestler.
Sonoko: It's okay~... I'm not sleeping~... Zzz
Yuna: You're sleeping! You're totally sleeping, Sono-chan!
Sonoko: Oooh~...
Sonoko: Yu-yu~... poke me... with a toothpick~...
Yuna: Huh? You sure?
Sonoko: Zzz
Yuna: Okay, I'll poke you in the cheek...
Sonoko: --tadah! I'm awake now~!
Fu: Just like that!?
Sonoko: Okay then, Nibosshi. What'd you want to talk about~?
Karin: I get the feeling we took way too many detours to get here...
Karin: ...I got a message from the Taisha last night.
Togo: From the Taisha? Sonocchi...
Sonoko: I haven't heard anything~ What kind of message?
Karin: ...this.
Itsuki: We can look at it?
Karin: It's faster that way.
Fu: Okay, then, here goes.
Yuna: Ah, I wanna see too! Let's see...
Yuna: 'In 2 weeks, Miyoshi Harunobu will visit Sanshu Middle to inspect Miyoshi Karin's lifestyle'...
Yuna: Huh? Miyoshi Harunobu-san, isn't that...
Karin: My older brother.
Yuna: Ah, so it is that elite big brother of yours!
Itsuki: But why was it from the Taisha? Couldn't your big brother have contacted you himself...?
Sonoko: I think that's a little difficult~
Sonoko: 'Cause Nibosshi's big brother is suuuper high up even in the Taisha ranks~
Yuna: Being distinguished means you can't even contact your own family?
Sonoko: I don't think it's that you can't, it's just that there are a lot of difficulties behind it.
Togo: You need to go through the Taisha just to send one message...? I guess even the distinguished have their own problems.
Fu: So, Karin. What did you want to talk about in regards to that message?
Karin: Everything. For starters, I don't even know the meaning behind it.
Karin: Why would he need to come see my lifestyle this late in the game...?
Yuna: Well, that should be obvious since he's your big brother! I bet he's worried about how you live.
Togo: ...
Togo: We never had any direct contact.
Togo: And yet now we've gotten this message so suddenly from the Taisha-- and from someone so high in rank, too. It's a little worrying.
Yuna: Togo-san...?
Fu: So you think there could be some special meaning behind it?
Togo: Yeah...
Sonoko: Maybe it's... No, maybe it really is...
Karin: If you have any ideas, please tell me, Sonoko.
Sonoko: Maybe the Taisha suddenly needed a hero for some reason.
Itsuki: You mean... the Taisha intends to take Karin away...?
Fu: If they suddenly needed a hero... then Karin would be the easiest to transfer among all of us, wouldn't she?
Karin: But... they said I could stay here until graduation... I got their permission!
Fu: The situation... must've changed.
Fu: The Hero System is apparently being updated to the next stage... so they must need hero data...
Yuna: N-no way...
Yuna: We can't let that happen! Karin-chan's our buddy!
Karin: Yuna...
Fu: ...You're right.
Fu: It would leave a bad taste to leave any one of us out, wouldn't it?
Karin: Fu...
Togo: We're comrades who ate udon from the same pot... It's too lonely to lose a buddy.
Karin: Togo...
Itsuki: I... I don't want to say goodbye to Karin-san either!!
Karin: Itsuki...
Sonoko: Eheheh. Me neither. I want to play and talk with Nibosshi some more~
Karin: Sonoko...
Karin: Guys... Guys, thank you so much!
Yuna: Awrighty! To graduate with Karin-chan!
Togo: To graduate with Karin-chan!
Fu: To get Karin to send me off!
Itsuki: To see Karin-san off!
Sonoko: Let's think of a way to make them not take our Nibosshi away~!
Karin: Woah, c-calm down... the other customers are looking at us...
Yuna: How can we calm down!? Karin-chan, you want to graduate with us too, don't you!?
Karin: I-I guess...
Fu: Then let's form our base of emergency operations here!
Fu: Let's call it... Operation Karin's Kidnapping Counterplan!
Sonoko: Ah, I know. We write 'Karin's Murder' on a huge piece of paper.
Togo: Leave the caligraphy to me.
Karin: No, I'm not getting kidnapped! Or murdered!
Fu: Don't sweat the small stuff! Hero Club five tenets! If you try, you're likely to succeed!
Yuna: Here's where we show them the true strength of the Hero Club!
Itsuki: Exactly, Yuna-san!
Sonoko: By the way... to show them our true strength, what exactly do we show?
Yuna: ...
Yuna: W-what do you think we should show them, Itsuki-chan?
Itsuki: I-I dunno?
Fu: Aw man, my little sister's so cute~
Fu: Our goal is to make the Taisha not take Karin away.
Fu: So who here has the idea with the best chance of succeeding?
Togo: Let's see...
Sonoko: That's kinda hard~
Fu: Okay, let that be our homework for today! Let's regroup tomorrow to discuss our options!
Yuna: Okay!
Togo: Understood!
Itsuki: I'll do my best!
Karin: Guys... thank you...
Fu: Oh, and more udon, please!
Itsuki: You can still eat!?
Sonoko: Amazing~ I've never seen someone who could eat that much~

Fu: Okay guys, think of any good ides?
Yuna: Me!
Fu: Okay, Yuna!
Yuna: I wrote a letter!
Karin: A letter? To Aniki?
Yuna: Yup. To your big brother. I wanted to show him just how much we need you, Karin-chan.
Yuna: Okay, I'll read it now:
Yuna: To Karin-chan's big brother. Nice to meet you, I'm Yuki Yuna. Karin-chan's such an important buddy—
Karin: Hang on! You don't need to read it out loud here, do you!?
Yuna: But I did my best to write it!
Karin: That's not the problem! I-it's just embarrassing, okay!?
Fu: Embarrassing Karin is fun and all, but let's move on.
Fu: You, Togo?
Togo: Same as Yuna-chan, I wrote a letter.
Togo: It details just how much Karin has worked for the good of our great nation... a true masterpiece.
Karin: You don't have to read it, okay?
Togo: ...how unfortunate.
Fu: You, Itsuki?
Itsuki: I wrote a letter too...
Fu: I didn't expect all three of you to match up...
Sonoko: Well, the hero club really does get along, huh~
Togo: Meaning, Sonocchi?
Sonoko: Eheheh, actually, I wrote a letter too~
Fu: Which means... I'm the only one who did something different, then, eh.
Yuna: What was your idea, Fu-sempai?
Fu: I went with this!
Yuna: That's...
Togo: A video camera?
Fu: A video letter! We use this to record the Hero Club's daily activities so we can show how important Karin is to us!
Togo: So the starting point was the same, but the destination was different, huh?
Yuna: A video letter... yeah, I think that's great!
Sonoko: True, if we showed them how much we all get along, I'm sure they'll change their minds~
Karin: You... think so?
Sonoko: Yup. I mean, being with buddies is definitely fun.
Karin: Yeah... I... think it's more fun to be with you all.
Fu: Okay, then let's get to making that video letter!
Sonoko: Ah, I want to be the cameraman, then~
Togo: Are you okay with using a camera?
Sonoko: I'm okay. I'll do my best to capture all of your heroic figures with the camera~

One hard fight later-- the video somehow managed to come out well-done.
Karin: Hopefully Aniki will change his mind when he sees it.
Karin: ...
Karin: I want to stay in the Hero Club until I graduate...

Two days after all the hero club's letters and the video letter were sent to Harunobu—
Karin: I got a reply from the Taisha.
Fu: That quick!?
Sonoko: Even the Taisha has its slow and quick departments, you know~
Yuna: How was it? Do you think our feelings made it through to them...?
Togo: I'm sure it's fine, Yuna-chan.
Karin: In the end...
Karin: ...It turned out okay!
Yuna: Yay! Now we can graduate together, Karin-chan!
Itsuki: I'm so glad!
Fu: Heh, our tactics won!
Karin: What kind of contest do you think this was...?
Karin: By the way, this is how the response email was.
Yuna: Let's see...
Yuna: 'Your healthy middle school lifestyle has been confirmed. Please continue to live fulfiling days at Sanshu Middle.'!
Karin: Oh, also they sent some sort of DVD. Haven't seen its contents yet. It's from Aniki, apparently.
Togo: The club computer should be able to replay it. Shall we take a look?
Fu: Okay, if you will, Togo!

Young Karin: Looky, looky-- I can swim now!
Young Karin: Soon I'll be a better swimmer than you, Onii-chan!
Young Karin: And then, even Mommy and Daddy will...
Young Karin: I'm doing secret training, so go away, Onii-chan!

Young Karin: Watermelon!? I can have your watermelon!?
Young Karin: But... no thanks. They'll get mad at me if I eat your share, Onii-chan...
Young Karin: Go away! I'm playing by myself!
Young Karin: I-I'm not lonely at all! Hmmmph!

Karin: Whwhwhwhwhy's this video on there!?
Yuna: It's a tiny little Karin-chan~!
Itsuki: Ah, looks like it's a sports day video next.

Elementary Karin: Hmph! I'm obviously the best!
Elementary Karin: A calvary battle, huh! I'll wipe everyone out!

Fu: Aww, Karin was Karin even back then, huh.
Karin: What's that supposed to mean!?
Karin: Wait, why would he even send a video like this!?
Togo: I wonder if this is a growth diary for Karin-chan.
Sonoko: Maybe it's a response for the video letter~?
Karin: I don't need a response like this! Power off!
Yuna: Aw~ I wanted to see more of it...
Karin: Geez... how much do you want to shame me, you stupid Aniki!
Itsuki: Ahahah, I'm not even sure what kind of person Karin-san's big brother is anymore.
Karin: He's... well, a super honor student, I guess.
Sonoko: He's high up in the Taisha~ Everyone else is an adult, but he's the only one who seems like a 'big brother' kinda guy.
Fu: Hmm, I guess to be in the Taisha at someone like Karin's brother's age, he really must be superior.
Karin: I guess.
Karin: ...That's why I've always been compared to him.
Yuna: Karin-chan...
Karin: There were others who would insistently tell us just how amazing he was...
Karin: Compared to my lump of talent for an older brother... there was nothing I could do.
Itsuki: ...I think I kind of understand how you feel, Karin-san.
Itsuki: I've been compared to Onee-chan, too.
Fu: That's the first I've ever heard of that.
Itsuki: We did go to the same elementary school after all. So naturally they'd compare us.
Itsuki: Sometimes they'd say 'oh, but your older sister was like that'.
Fu: I see.
Itsuki: But I didn't hate it. I was proud to hear how amazing everyone thought you were.
Fu: Itsuki...
Itsuki: I'm thankful for that, but... Karin-san, did you not get along with your older brother?
Karin: It's not that we didn't get along... It was just uncomfortable when Aniki would cover up for my clumsiness.
Karin: I... I didn't understand why Aniki would even care about someone like me.
Yuna: Wasn't it because you're family?
Karin: Even in our family, Aniki was the center of attention... I was often told not to get in his way.
Karin: So I tried my best not to talk to him.
Karin: But Aniki would still try to be mindful of me...
Karin: He'd ask me if there was anything I didn't understand about my homework, or he'd ask me what I liked and disliked.
Karin: But eventually we stopped talking even at home...
Karin: I think even Aniki began to be disgusted by my clumsiness.
Itsuki: Um... let me ask just one thing.
Karin: What?
Itsuki: Did your big brother ever tell you to get better grades or to be more like him?
Karin: No. He has told me he'd share his snacks with me, though.
Itsuki: ...
Itsuki: Karin-san. I've been a little sister since I was born, so this is a little sister professional opinion, but...
Itsuki: I think your big brother loved you very much.
Karin: Huh?
Fu: I agree. And are you sure your big brother doesn't think you just hate him?
Karin: Huh!?
Togo: If you're the one who tried not to speak with him too much...
Togo: Then maybe he thought you were rejecting him, so it became harder for him to talk to you too.
Sonoko: I agree with Wasshi.
Karin: H-how do you all come to that conclusion!? No matter how I think about it, I'm the one who's hated...
Fu: Karin, let me tell you something good. ...There's no such thing as someone who hates their little sister!!
Karin: Just because you say it like it's a fact of nature doesn't mean...
Yuna: So don't you think maybe when your big brother tried to contact you, he was just worried about you?
Itsuki: That's what I think.
Itsuki: Besides, your big brother sent you that growth diary video, right?
Itsuki: The fact alone that he's been holding onto that video for all this time is proof beyond all else that he treasures you, Karin-san!!
Karin: No way... if that were the case...
Karin: A-Aniki... if you were worried, why not just say so...? We're siblings after all...
Sonoko: In that case, I'm really glad we sent him that Hero Club video letter~
Sonoko: I'm sure your older brother was relieved to see you so happy too, Nibosshi.
Fu: Case closed, then!
Togo: That said... Yuna-chan, since when did you know about Karin-chan's older brother?
Yuna: Since that sleepover we had earlier, right?
Karin: Ah, yeah. I guess I ended up talking about him back then.
Togo: Back then, huh... I guess I really should've joined the sleepover too...
Fu: Okay, in that case, let's all have a sleepover next time!
Yuna: Really!? I'm sooo looking forward to it!
Fu: Okay, then let's make plans! Togo's the battle strategist!
Togo: Yes, sir!
Sonoko: Wasshi~ You're a battle strategist~
Togo: First, let's find a day where we're all free.
Yuna: Karin-chan, when are you free?
Karin: I'm ready whenever!